Royal palm head colors

I have been raising royal palms for a little over a year now and have noticed my tom's head changes color from white to red to blue. I can't seem to find any information as to what this means. Anyone know? I first thought the red may be when he's wanting to breed but that's not always the case. Sometimes during the courting it's blue.

All turkeys do it. It only means that the turkeys are sexually mature and is trying to attract a female. His snood should extend quite long soon too. The hen turkeys also have red and blue coloring while mating are, but not nearly as dark. How many toms and hens do you have?